Nozzle construction



P 8, 1953 c. c. VANDERWALL 2,651,372

NOZZLE CONSTRUCTION I Filed Oct. 5, 1951 2 Sheets-Sheet l I! HIM 1 INVENTOR. c1. [Fl-0R0 c. VANDERWALL ATTORNEY c. .c. VANDER'WALL J NOZZLE CONSTRUCTION Sept. 8, 1953 2 Sheets-Sheet 2 Filed or..- 5, 1951 INVENTOR. CLIFFORD c. MNDERWALL' A TTORNEV ax a y i ablel llm fi ni Patented Sept. 8, 1953 NLUNITED STAT 2;65i,s7-z i I V v coNsrRUcTIoN" i Clifford C. Vanderwall to.,Ans,ul.Chemical,. Co

, acorporation o f Wisco TENT, oFFIcaj? Maiinette, Wis., assignor mpany, Marinette, Wis., v. 4 v H v 3;Clai1ns-.

This invention relates to a nozzle construction for producing streams of lpredeterminedyshape and velocity. More specifically, the invention relates to the production of streams of comminuted free-flowing fire-extinguishing dry chemical.

The 'nozzle constructi'oncf the present invention is -particularly adapted for producingstreamsof gas-fluidized dry; chemical-t adapted for extin+ guishing gasoline; kerosene and: paraflin oil fires;

the dry chemical being propelled through the l .l fiigure 4' is a vertical sectional view of the nozzle shown in Figure 1 having the plunger in closed ljigure 5 is a sectional view of the nozzle shown in Figured having the plunger n open position fgrstreamemissiom} 5 e Ei gure -Gisa sectional view taken onilines 6-6 of-F'i'gurej5l 1 Figure 7 isa perspective .view of the plunger, 1. 1

I fgur'a isaperSpciiiye exploded'view,"partly exits constituting the nozin stiom'bffthefel" zlecohstructionl' If" V i v i 1 The nozzleiofthe presentjinvention is particuj: larly '.adapted for 'use .-with ,dry chemical fireflex: tinguishing equipment. Such ,e quipment for example, may consist ofasteelcylinder holding the fiery; chemical charge, a cylinder ofv nitrogen gas which; provides the pressure forjexpelling the dry cheinicaland a rubbermho sevequippe'd with anozzlelconstruction injaccordancewith the present invention forLeQntrQlling and" directing the flow oitdrycheln ical."

QR fiirfi itp t rawi g t e. noz e o t jtion"'c'oinpri'sesa ylindricalbody portion l'pro vided .with an internal .bore f or housing a slidame' 'mnger 2 which serves tdcontrol the flow of a stmam Q dW-l chemical, to .-s.upp1 fe b a l o 'znif e ei t it lienqz l a hose cod-plir-i'g'8 afiits threa'dedend F6? The out let bored)! of the nozzle body-is of such dimension asst reeeiye therei r hq.pqnicalth r.2 of; an

inte io lmf theuezzle mal -y l d t! lwh q s fidall edc i eamed-awa g jm e'wi a th fi fi fiial il i-Fa 9 .9 al -.P azafiQ, it to seal the bore against passage of gas pressure *z'liheibp erm n e and dry chemical supplied by hose 20 at the intake end of the nozzle. The intake end of the nozzle body isprovided with a bore 24 which-is sma'er in diameter than the outlet bore '21-. The'surfaces-of both bores are preferably parallel with the longitudinal axis of the nozzle. Thein take bore 2 4 is adapted to'slidably receive and guide the eyimdricaisteiir-zb'bf the'pltfigf t axial-longitudinal movement therein. The it Q is provided with grooves o'r c'hannels in' lf'ig ure 7, througli which the g chemical supplied *byhose 20 can a-ts thi'o'iigli bore 24' and enter into theoutletbore'f-l M the plunger Z is moved towar'd thefriozzle "p"as shown in Figurefi. The 'heac'lfportiorf f" hi5 plunger is conically shapedsothat'the incl'ifi 'd walls are positioned at a predeteijrnined angl the axis of the bore 'so as'tb direct-the dry'cheiiii' cal streams passing thrdiigh"'the "cl'iaiifieists against the inner walls o'f' jthe' bore 21 asshown in Figure 5 and which aretlienredirec'ted di' wardly of the nozzle tojoiniothei lik'redii ec -d streams and tofemrg froin'lthbo e213: the nozzle tip to form a combined stream. iavillaflsli benoted in If'igure 5 that the plunger is'qocated at a predetermined distancefr'oin mergoz'z e tip so that the major portionscfemergingrediretta streams Hand [2 "re'conibiiie outside the 6% e tip to form a cdrnb'ined s'tiairi'. J" The 'shapefvelocity' anaemmem emerging stream "can bepredeterrnind by suit able changes-in the structure anauocancncr the plunger in the nozzle "b'orei When two opposed channels I3 are provided"; gran-sea ed'stream; as 'shown'iii Figure 5, will be 'produce'tfl. "Byiri creasing the numberof chann s'in"the' plungi 's'tem fstreams of other "l'des ifed snapes-c'ahabe readily produced or the character describe Patent 2,484,943. Means are provided plunger} whichjconsists of 'a-ha'ndle 6 pivoted on pin 5] passing through openings ficfin' the handle? j The handle is prov ded" with pair of opposed depending" arrfn's fid'ernbracirigthe nhz zle body and'thef efids th reof 'are r cessedat lihfdr' ec iving a pin ajwhic lrpasses through opposed Slots I 5" the nozz'lejbod'y. 'Pl'un'ger 2 is'p'ro'vi'ded wi'tha ho e "I 4 at itsfo'rwar'd' tip whicli isi'adapted'to receive the"pi r1'" "passi through the bppdsedfibn itudmauy" 'extenldirfgfgllid Slot IS in the nozzle body' fi'laf sfififlli-W'' at d the of the handle 16; as shown nor allwu gmg t e' ha a e lun e 1 pl a dk fii je ownward movement ofihandle 6'- 'Figure" 4; {thereby to position the "irlFigufe' li faces 9 and I! to separate, allowing the stream of fluidized dry chemical to flow around plunger 2, the dry chemical being so guided and controlled in quantity and direction by. grooves l3 and shape of the plunger as to impinge upon the inner walls of body I, producing dry chemical streams II and 12, as shown in Figures 5 and 6. When handle 6 is released, plunger 2 returns to closed position under force of spring 4. The action of the pressurized drychemical is to open plunger 2 but this is prevented by spring 4.

The present nozzle construction is adapted to produce a fan-shaped relatively low velocity stream of dry chemical as can best be understood by reference to Figure 5, wherein the initial stream ll) of dry chemical suspended in a gaseous medium, such as nitrogen or carbon dioxide, passing through the nozzle is subdivided into a pluralityof streams, for example two streams H and I2, when using a nozzle having the construction shown in Figure 5.

V The stream In is reduced in velocity as it passes through the grooves l3 of plunger 2 and is subdivided into two separate secondary streams H and 12 which impinge against the interior suriace -of the nozzle bore 2! and which are then redirected essentially forwardly of the mouth of the nozzle and combined into a unitary stream having the contour shown in Figure 5 and crosssection shown in Figure 6. It is to be noted that the two streams H and I2 as they emerge from the mouth of the nozzle do not impinge against each'other but rather flow and merge together to produce a fan-shaped stream substantially elliptical in cross-section. In accordance with the presentinvention the shape, direction and velocity of the dry chemical stream can be predetermined and regulated to most effectively extinguish the flames because the velocity and shape are controlled to distribute the finely divided chemical at an adequate rate for efficient and efiective extinguishment of the fire.

The present nozzle construction is adapted to produce streams similar to those produced by the nozzle construction described in Patent 2,484,943 and-possesses a number of advantages thereover since a single sealing surface is utilized in the present construction which is provided by the sealing surface 5 of the plunger as compared with the necessity of a plurality of seals in the prior constructions. The single seal thus insures a high-degree of protection against entry of dirt or moisture within the nozzle which might render it inoperative due to cementing action of any dry chemical present. The present nozzleconstruction also permits a straight line of flow of the dry chemical through the nozzle. The nozzle is simple in constructionand has relatively few parts, all of which can be produced at low cost. The nozzle construction can be actuated manually and also can function automatically for safety purposes in relieving excessive pressure which might build up in the supply line because excessivepressure will displace the plunger against the normal spring pressure and permit the gas to escape from the nozzle.

The shape and character of the streams produced by the present nozzle construction can be predetermined by varying the depth of the grooves or channels I3 in the plunger 2 or by providing more than two grooves so as to produce 7 different types of streams as shown in Patent 2,484,943. I

It is to beunderstood that numerous changes and modifications may be made in the specific embodiment of the invention herein disclosed and it is intended to include such modifications within thescope of the appended claims.

1. A nozzle for producing streams of gasexpelled dry chemical having a predetermined shape and velocity comprising a nozzle body provided'with a bore for housing a slidable plunger, said plungerb'eing providedwith a sealing surface, a seat in said bore adapted to mate with the sealing surface of said plunger to seal the bore against flow of gas-expelled dry chemical and means to actuate said plunger to open or closed position in said bore, said plunger being provided with a plurality of channels for permitting flow of streams of dry chemical therethrough, said plunger having a conically shaped head portion having inclined walls positioned at an angle to the axis of the nozzle bore to direct the dry chemical streams passing through said channels into impingement against the inner walls of said bore, the inner walls being substan-.- tially parallel to the longitudinal axis of said nozzle, said walls redirecting said streams essentially forwardly of the nozzle to joinother like redirected streams and to emerge from said chamber while recombining the major portions of the streams outside of the nozzle to form a combined stream, the said plunger being positioned at a distance from the nozzle tip to substantially predetermine the shape and velocity of the emitted stream.

2. A nozzle for producing streams of gas-propelled dry chemical having a predetermined shape and velocity as defined in claim'lwherein the stem of the plunger is provided with two opposed longitudinally extending channels for permitting flow of streams of dry chemical therethrough.

3. A nozzle for producing streams of gas-expelled dry chemical having a predetermined shape and velocity comprising a cylindrical nozzle body, a slidable plunger housed in the boreof said nozzle body, said plunger having a head portion and a stem portion, said head portion being provided with an opening for receiving a pm, said stem portion being provided with a plurality of channels to permit streams of dry chemical to pass therethrough, said head portion being provided with a, sealing surface, a seat in said nozzle bore for mating with the sealing surface of said plunger, a pair of opposed guiding slots in said nozzle body adapted to receive a pin, said pin passing through an opening provided in the head portion of said plunger for slidably moving said plunger within said bore, a bifurcated handle pivoted on said nozzle body, the arms of said handle being in engagement with the ends of said pin extending outside the nozzle body, said plunger being adapted to be manually moved upon actuation .of said handle to open position.

CLIFFORD C. VANDER-WALL.

References Cited in. the file of this patent UNITED STATES PATENTS 

